Mario sees popcorn and pretzels as perfect substitutes. He is always willing to substitute 3 cups of popcorn for 1 cup of pretzels. His indifference curves for popcorn and pretzels are _____, and at the optimal consumption bundle his marginal rate of substitution of popcorn for pretzels is _____.
A) right angles; 3
B) right angles; 0.33
C) straight lines; 3
D) straight lines; 0.33

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The Answer of Mario sees popcorn and pretzels as perfect substitutes. He is always willing to substitute 3 cups of popcorn for 1 cup of pretzels. His indifference curves for popcorn and pretzels are _____, and at the optimal consumption bundle his marginal rate of substitution of popcorn for pretzels is _____.
A) right angles; 3
B) right angles; 0.33
C) straight lines; 3
D) straight lines; 0.33

Mario Sees Popcorn and Pretzels as Perfect Substitutes